Lineswitch driving arrangement for motor and hand operation



Nov., 17, 1931. A. B. DE GIORGI -f 1,832,189

LINESWITCH DRIVING RRANGEMENT FOR MOTOR AND HAND OPERATION Filed July 29, 192s Patented Nov. 17, 1931 nire STATES ACHILLE BAGNAGATTI- DE GIORGI,` or MILAN, 'ITALY LINEswIToH DRIVING ARRANGEMENT non ivIoToRAND HAND orriRAtrIoNk Application fued July 29, 1929, semi No. asado?, and in naiy'rebruary y4, 1929.

The present invention relates to lineswitch driving arrangement for motor and hand operation.

As compared with the arrangements heretofore known, the arrangement according to the present invention exhibits the advantage i that it does away with the complicated devices for going over from hand to motor operation. Besides it dispenses with the mechanical or electromagnetic brakes, owing to the provision of a special planetary transmission gear which allows of a high reduction in the number of revolutions from the motor to the switch drive proper and to automatically recuperate the inertia energy of the revolving v parts. n

The invention essentially distinguishes itself by the fact that the driving pulley is entrained into rotation by a radial arm of the main driving shaft, this arm coming into engagement with pawls secured to the pulley body, and the main driving shaft being actuated by the shaft of an electric motor through satellite pinions and toothed rims.

The body of the driving pulley is invariably connected to a hand operating crank; when this crank is actuated, the pulley revolves and its pawls are brought out of engagement with the above named arm by means of cams against the action of a return spring. y

The accompanying drawings illustrate, by way of example only, one form of the invention. Y

Fig. 1 shows the arrangement in longitudinal projection;

Fig. 2 shows the arrangement in cross projection along the line 2-2 in Fig. 1.

The driving pulley 1 has a body 2 resting on the casing 3, in which the planetary gear is lodged for transmission of the movementv from the shaft 4 of the motor 5 to the main driving shaft 6.

As may be seen from the drawings, the motor shaft 4 carries a pinion 7 meshing with the satellite pinions 8, which are fixed on spindles 9 and mesh with a toothed rim 10. On the spindles 9 the pinions 11 are also keyed, which engage the toothed rim 12 invariably connected to the main driving shaft is brought to a standstill.

6. The revolving movement of the shaft 4 is Atherefore transmitted to the main driving shaft 6 with avery high reduction inthe number o frevolutions, as required for operating the switch. 4 v f The shaft 6 rotated by the 'speed reducin gear carries an arm 13 provided with a cato 14 movable freely in axially direction and during rotation is adapted to engage either one of the pawls 15 and yl5', said pawls' being 60 pivotally secured to the disk 2 and consequently rotated therewith, or these pawls are rotated bya spring 1 6. In this manner the shaft 6 and disk 2 are connected with each other during rotation. f 65 In order to obtain the automatic stopping of the diskV 2 during rotation of the shaft 6, cams 2O are provided whichA serve to disengage the pawls l'157er lfrom the catch 14. These cams Yare iixedupon the stationary wall 7u 3a of the body?) and act upon extensions 15a and 15a carried by said pawls. More precisely, when at the end of a revolution of the disk 2, the pawl 15 lies opposite a cam 2O which acts upon the extension 15@1 and over- .T5 comes the action of the spring 16 of the active cam, thus moving the pawl so that the end thereof disengages the catch 14. Accordingly, the arm 13 which is fixed upon the shaft 6 continues to rotate, while the disk 2,@80

Since the body 2 is rotatable on a sleeve 3, said body can be operated by hand when desired, through the medium of the hand lever 18. In order that the pulley may be operated independently ofwS kthe motor, the hand lever may form a permanentpart of the body 2 to rotate therewith,

" or it may be detachably connected for motor operation alone.

The whole arrangement can be advantage- L99 ously carried out as a compact construction and be enclosed in a casing which at the same time serves as a receptacle for the lubricant and as a protection against weather iniuences, so that'the apparatus; can be installed in\` the open without prejudice.

Further the compact construction reduces the occupied space to a minimum. i

Of course the execution details may be `10() varied in practice Within the spirit and scope of the invention.

What I claim and desire to secure by United States Letters Patent is:

5 l. A device of the class described comprising an electrical motor, planetary transmission gearing driven by the shaft thereof, a main drive'sha'ft driven byfth'e gearing; apulley rotated by the gearing, movable projections carried by the pulley, a radially dipsposed arm carried by themain drive' shaft adapted to engage one of lsaid projectionsto impart rotary movement to the pulley;

2. An arrangement according t0 claim. 1 characterized by the fact that the main driving shaft is fixedlyconnectedto a radial'arm provided Witlran axially adjustable extension adapted-to come into engagement With themovableproj e'ctionsfsecured to the-pulley', 2o conjugated cams on said casing consisting. in spring loadedpaWls'Whicli are brought out of engagement With'theV radial-arm by? means of said cams, the pulley having connected there"- with` a crank for hand operation; I 3. An arrangement according'the; claim 'l andrcharacteriz-edby theifa'ct that the :planetaryy transmissionl gearing comprises a pinion fixed? onf the'A motor shaft, satellite1y pinions meshing-therewith, a circunscribing toothed 3U rim fixed to said casing'ialso-meshing-With saidy satellite pinionsg, eachY satellite'. pinion having ixedon its hub another pinion,- a circumscribingf toothedY rim-V. meshing; with the last named pinions `land iixedlyl connected .t0 the main drivingishaftiothepulley..l Y

; ACHILLE BAGNAGATTI-I)EJG'IOR(.1I.y 

